Machine for milling nuts



(No Model.) 3 sheet sheat- 1.

G. E.- ROBERTS. i MACHINE FOR MILLING NUTS.

No. 355,718. Patented Jan. 11, 1887. I

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(No Model.) 3 Sheets-Sheet 2.

0. E. ROBERTS. MACHINE FOR MILLING NUTS. No. 355,718. Patented Jan. 111887.

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N, PETERS. PhMO-Lilhognphur, Wilmington. D, Q

(No'ModeL) 1 v v 3She ets Sheet 3, C. E. ROBERTS.

MACHINE FOR MILLING NUTS.

No. 355,718. Patented Jan. 11, 1887.

' UNITED STATES PATENT QRFICR.

CHARLES E. ROBERTS, OF oHIoAeo, ILLINOIS.

MACHINE FoR MILLING NUTS.

SPECIFICATION forming part of Letters Patent No. 355,718, dated January11, 1887.

Application filed September 28,1886. Serial No. 214,725. (No model.)

To all whom it may concern;

Be it known that I, CHARLES E. RoBER'rs, a citizen of the United States,residing in Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Machines for Milling Nuts, ofwhich the following is a specification.

My invention relates to machines for milling the'edge faces of boltheads and nuts, and is designed to improve the present construction ofsuch machines.

In my improved machine I employ a pair of horizontal rotatingmilling-cutters placed opposite to each other, so as to operate uponopposite sides of the nut simultaneously, and a nut-holder swingingat'right angles to the cutters and acting to lower the nut into thespace between and in contact with the cutters.-

This nut-holder is mounted upon trunnions, and is swung both up and downautomatically. The mechanism by which the holder is swung is thefollowing: A toothed segment attached to the holder engages with asliding rack operated by a cam upon a transverse shaft receiv ing motionthrough a gear and worm from a longitudinal shaft actuated from one ofthe driving-pulley shafts or other suitable source of power, the cambeing so constructed as to slide the'rack and swing the holder in bothdirections. I also partially rotate the nutholder after each returnswing movement, to present fresh surfaces for the next operation of themilling-cutters. For this purpose the parts by which the nut is clampedare made rotatable in the swinging head of the holder, and the rotationis caused automatically by devices which will be fully describedhereinafter. I also cause the periodical rotation above mentioned 'tocease automatically by mechanism set forth at length in the descriptiongiven below herein when the nut has been treated upon all sides. Thenature of these various mechanisms and their construction and mode ofoperation will be understood from the drawings accompanying thisspecification and forming part thereof, in which- Figure 1 is a plan ofmy improved machine, and Fig. 2 a front elevation thereof. Fig. 3 is atransverse section on line 3 3 of Fig. 1. Fig. 4 is a transverse sectionenlarged, showing the side of the nut-holding and operating devices.Fig. 5 is an enlarged front view of the parts illustrated in Fig. 4, thehand-wheel being left off to show the parts behind it. Figs.

6 and 7 are enlarged detail views of portions 5 of the machine. Fig. 8is an enlarged section upon the line 8 8 of Fig. 3. Fig. 9 is anenlarged vertical section through the nut-rest upon the line 9 9 of Fig.8. Fig. 10 is an enlarged horizontal section through the clutchingdevices for operating and stopping the rotation of the nut. Figs. 11 and12 are detail views of the spring-bolt, whereby the nut holder is lockedagainst rotation during the milling operations.

In said drawings, W represents the bed of the machine, the upper surfacethereof acting also as a slideway, upon which the cutter-carryinghead-stocks and the nut-holding devices may be moved longitudinally andadjusted as occasion requires.

A and Bare each rotating milling tools or cutters having a common axialline and placed I with their operating ends toward each other, so theymay operate simultaneously upon opposite sides of the nut. They arerespectively operated by pulleys A B, mounted inheadstocks A B".

0 represents a saddle sliding upon the bed W, and held thereto by thebolt to and shoe w. Upon this saddle is secured, as shown in Fig. 9, acasting, embodying a pan, 0, to receive the cuttings from the milling,and side checks, 0 (3 In the latter. the nut-holding devices now to bedescribed are supported by the trunnions c, resting in bearings 0*. Thenut, preparatory to being milled, is threaded upon the end of a rod,c,extending througha sleeve, 0, and the rod, after being adjusted, isclamped so as to be immovable in the sleeve by turning the hand-Wheel 0which is threaded upon the opposite end of said rod 0'. The sleeve 0 isfree to rotate in the head 0 and the latter oscillates upon thetrunnions c and carries the nut down into contact with the milling-toolsand back again after it has been operated upon. This oscillation iscaused by the reciprocation of a rack-bar, D, which engages a dependingtoothed segment, O, formed upon or attached to the head 0 the rack-barbeing reciprocated by a grooved cam, D upon the end of a transverseshaft, D, supported in bearings 0 attached" to the saddle O and passingthrough the bed W. The parts 0 G (J and O make up what may beappropriately termed the nut-rest in analogy to the tool-rest of anordinary lathe.

The shaft 1) is provided with a rigid collar, d, by which and the cam Dit is held firmly against end play, the collar setting up against theshaft-bearing upon one side and the cam setting up against the bearingupon the other side. The shaft is actuated through the wormwheel D looseupon said shaft and having a clutch side face, the sliding clutch G,keyed to the shaft by the pin 9, but sliding thereon and engaging withthe clutch-face of gear D, the worm D upon the shaft 1) and meshing withthe worm-wheel D and the shaft 1), receiving power from the shaft ofpulley A through pulleys D and D and a connecting-belt'D.

Between the oscillations of .the head 0" the rod 0 and sleeve 0 arepartially rotated to present other surfaces of the nut for the nextmilling operation. This movement is caused as follows: The cam E uponthe clutch G engages at every revolution with a swinging lever, E,pivoted upon the bracket 6 and connectedby a jointed arm, E E, with aswinging arm, 1?, mounted upon the sleeve 0 or upon the hub of theratchet-wheel E", and operating said wheel intermittently by means of apawl, Eflborne by the arm E The return movement of the lever, which iscaused by the spring e and is aquick one, carries the ratchetwheel withit by the engagement therewith of the pawl. In Fig. 5 this engagement ofthe wheel and pawl will take place in the notch just above the pawlbefore the cam has ceased its action upon the lever E. A set-screw, e,serves to limit the return swing, and the pawl is preferably influencedby a spring, as shown.

The'parts composing the jointed arm E E are coupled together by a maleand female screw-joint, (particularly illustrated in Fig. 7 one partbeing thereby permitted to twist upon the other, to accommodate theswinging of the head 0 without affecting the ability of the arm toperform all its functions.

The ratchetwheel is locked between its rotary movements by aspring-bolt, F, secured in a housing, F, upon'the h'ead O and enteringthe peripheral spaces in the wheel Ff. A pin,

f, secured in the bolt, projects through the housing, and aninclined-surfaced projection, f, upon the arm E comes in contacttherewith at each forward swing of said arm E, and raises said bolt,thereby releasing the wheel, so it can rotate with the pawl E The formof this bolt is more particularly set forth in the detail views, Figs.11 and 12, the leg f thereof serving as a guide in its movements. Thecavity f holds the spring by which the bolt is depressed.

For the purpose of causing a cessation of the rotary movements of thenut when it has been milled upon all sides, the sliding clutch G isthrown out of engagement with the gear D at proper intervals. This isdone by means of the following devices: The shaft D is continued to thefront of the machine, and has.

mounted thereon a pinion, G. The pinion G meshes with another pinion, G,which bears a certain relation in the matter of size to the pinion G,depending upon the number of sides possessed by the nut being milled.Thus, in the drawings, the nut operated upon being sixsided, andrequiring to be placed in three po sitions for milling all its sides,the pinion G is made three times the size of pinion G. If the number ofsides upon the nut is greater or less than six, then therelative'difl'erence in size of the pinions is made greater or lessaccordingly. The pinion G is journaled upon a pivot, g, projecting froma stationary part of the machine, and bears upon its hub aninclined-surfaced projection, g", which at each revolution of pinion G",and each third revolution of the pinion G and its shaft D strikes a likeprojection, g", upon the hub of the sliding clutch G. The colliding ofthese projections g and g forces the sliding part of the clutch out ofengagement with the gear D, and as the opening of the clutch withdrawspower from the part G, that part and the shaft D at once stop, and nofurther movement of the nut, either oscillatory or rotary, takes placeuntil the clutch is closed again.

The clutch is kept open by the parts 9 and 9 until the finished nut hasbeen replaced by a fresh one, and then the operator turns the crank orhand wheel .G until said parts have passed each other, and the clutch isthen closed by the spring 9*, confined in the hollow end of the shaftD", between the ring 9 and the pin g. The machine then proceeds asbefore, milling the nut upon all sides and stopping automatically whendone.

As it is sometimes desirable to stop the oscillation or rotation of thenut at unexpected times, I have provided means for that purpose,consisting of a rod, secured in the hub 9 upon the pin 9 and extendingthrough and beyond the ring gfland furnished with a knob, g, capable of'turning thereon, and having a cam, 9", formed upon its rim bearingagainst the correspondingly-shaped rim of said ring. This device isoperated by the workman, who takes hold of the knob and detains it fromrotation for an instant, while the ring continues in motion, therebycausing these parts to separate, and in so doing to draw the parts ofthe clutch G D apart also. The same spring g will close the clutch G Dwhenever the knob g is turned again to close its own clutch with thering 1 The spaces m in the shaft D permit the sliding of the clutch bygiving room for the movement of pin 9. The checks 0 O are connected andsupported by the ribs an, the-latter forming one side of the pan 0. Thehead-stocks may be secured upon the bed by set-screws 88, or they may beheld and adjusted .in the same manner as the tail-blocks and tool-restsof lathes. The oil is supplied to the milling-tools from the reservoir0.

By employing twomilling-tools placed exactly opposite to each other andacting simullIO taneousl y upon opposite sides of the nut, the

vices for so actuating the head, substantially as set forth.

2. The combination, with the rotating milling-tools operating uponopposite sides of the nut, of holding devices for the nut havingintermittent oscillating and rotating movements, substantially asspecified.

3. The cutters, the intermittently-oscillating head,'and thein-termittently-rotating nutholder supported in said head, all combinedand operating substantially as'specified.

4. The cutters, the oscillating head, mechanism for intermittentlyactuating said head,

the rotatable nut-holder, and mechanism for intermittently actuatingsaid holder, all combined and operating substantially as specified.

5. In a machine for milling nuts, thecombination, with the oscillatinghead for carrying the nut, the mechanism for intermittently oscillatingsuch, head, and the actuating-shaft D of a clutch connec'tion betweensaid oscillating mechanism and said actuating shaft, substantially asset forth.

6. In a machine for milling nuts, the oscil lating head, mechanism forintermittently oscillating said head, the rotatable nut holder, andmechanism for intermittently rotating the same, in combination with theactuating-shaft I) and a clutch-connection with said shaft,substantially as set forth.

7. In combination with the mechanism for intermittently rotating thenut, a clutch for carrying power to said mechanism, and mech anism foropening said clutch timed to operate at stated intervals with respect tothe rotating movements of the nut, substantially as specified.

8. In combination withthe mechanism for intermittently rotating the nutand the mechanism for intermittently operating the head which carriesthe nut to the cutters, aclutch for carrying power to said mechanisms,and

mechanism for opening said clutch timed to' operate at intervals,substantially as specified.

9. In combination with the mechanism for intermittently rotating thenut, a clutch for carryingpower to said mechanism, mechanism for openingsaid clutch timed to operate at stated intervals with respect to therotating movements of the nut, and the crank G for closing said clutchat will, substantially as specified.

10. In combination with the nut holding and operating devices and themechanism for operating the same, a clutch for carrying power to thelatter and mechanism for operating said clutch at will, substantially asspecified.

11. r The combination, with the cutters, of nut holding and movingdevices consisting of an intermittently oscillating head, a rod threadedat one end to receive the nut, a sleeve surrounding the rod, and ahand-Wheel, the rod, sleeve, and wheel being jointly rotatable in thehead, substantially as set forth.

12. The rod having the threaded end to receive the nut, the sleevesurrounding the rod, and the hand-wheel threaded upon the other end ofthe rod and adapted to clamp the nut against the sleeve, all supportedin and in combination with the head moving to carry the nut to thecutters, substantially as specified.

13. In a nut-milling machine, the head can rying the nut and itsclamping devices and having the toothed segment, in combination with therack-bar meshing with said segment and cam for sliding said bar,substantially as specified.

. 14. In a nut-milling machine, the intermittently-oscillating head formoving the nut to and from the cutters, the toothed segment, the slidingrack-bar, the cam for actuating the bar, the nut-clamping devicesintermittently rotatable in said head, the ratchet-wheel, the pawl, thearm carrying said pawl, the jointed arm E", the pivoted lever, and thecam actuating said lever, in combination with the shaft D both said camsbeing mounted upon said shaft, substantially as specified.

15. The saddle O, the shaft D ,supportedin bearings 0 secured to saidsaddle and having a collar,d, the cam D, mounted upon said shaft,

and worm-wheel D also on said shaft, all combined, arranged, andconstructed as set forth.

16. The combination, with the ratchet wheel operating the nut-holder rodand sleeve, of the bolt F, having the pinf, the swinging armE having theinclined surface f, acting upon said pin, and the pawl E also carried bysaid arm, substantially as specified.

17. In combination with the intermittentlyrotati'ug nut-holder supportedin a swinging head, the jointed arm E E and a lever actuating said arm,substantially as specified.

18. In combination with the clutch G D the rod attached to the slidingpart G, the handle 9 ring and shaft D, substantially as specified.

19. In combination with the nut-holder, the

means for closing said clutch at pleasure, theside pieces, 0 0 the headfor carrying the and means for releasing it automatically, subnut to thecutters, and the clamping devices stantially as specified. for holdingthe nut, substantially as specified. IO

22. The supporting sides 0 0 for support- CHARLES E. ROBERTS. 5 ingthenut-carrying head, and the pan 0, cast Witnesses:

in one piece, substantially as specified. H. M. MUNDAY,

23. The nut-rest consisting of the saddle O, EDMUND ADCOOK.

